Exporting to SL as a mesh seems like a balance of triangle count and the physics settings (convex hulls etc.).

I think you need a lot less triangles than Curvy normally creates - so make sure to adjust the Resolution slider down for Curvy primitives, and experiment with the mesh simplification commands for sculpted meshes.

Ideally you would retopo a mesh specifically for SL, but tools for that are not currently available in Curvy.

It would be nice when the program could do meshes in collada and not sculpts.Many there want low prim and sculpts are not low prims.ALso many want have meshes.It would be nice when the program could do this ASAP.